Morton g



M. e. BUNNELL. GRUSHING MACHINE.

(No Model.)

Patented 0011.22, 1895.

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UNITED STATES EFICE.

PATENT MORTON G. BUN NELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK C.

AUSTIN, OF SAME PLACE.

CRUSHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 548,178, dated October 22, 1895.

Application filed March 27, 1894. $erlal. No. 5051325. (No model.)

To all whom it may concern.-

Be it known that I, MORTON G. BUNNELL, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Crushing-Machines, of which the following is a specification.

My invention relates to an improvement in crushing-machines of the kind in which the crushing-hopper comprises a pair of oppositely-arranged crushing-jaws, whereof one is arranged to have a vibratory action and is backed by and operated by a toggle, the latter being in turn actuated from an eccentric through the medium of a pitman.

In a crushing-machine characterized by my invention the toggle which comprises a couple of toggle-arms is operated bya pitman which forms a cam, as hereinafter more fully set forth, the said cam being arranged between and engaged by adjacent ends of the togglearms.

As a matter of further improvement the vibratory jaw is provided at its lower end with pivotal supporting means arranged to reciprocate toward and away from the opposite jaw during the action of the crusher.

In the accompanying drawings, Figure 1 is a longitudinal central section on a vertical 5o plane through a machine embodying my invention, the jaw, toggle, and cam being, however, shown in elevation. Fig. 2 is a detail section on a line 2 2 in Fig. 1.

A represents the stationary jaw, subject, of course, to adjustment, and B denotes the movable jaw. This movable crushing-jaw can be suspended by links, or it may have its lower corners provided with trunnions 1), arranged to turn within and move along ways 0 in or on the sides 0 of the main frame, it being obvious that the trunnions can have antifrictionrolls, if so desired.

The toggle comprises the arms or levers D and E, the former being arranged as a rear extension of the movable crushing-jaw. The arm or lever E has its rear end backed by a vertically-adjustable abutment F and is in effect pivotally connected with said abutment, the preferred arrangement in detail being to provide the abutment with a recess or socket f, in which the rear end of arm E is received, and to round said rear end, as at e, so that it can rock upon the rear vertical wall of the socket. The adjacent ends 6' and d of these arms are likewise rounded for rocking purposes at the middle of the toggle, and are separated by an intervening arm G, which forms a cam for operating the toggle. This cam is operated by an eccentric H on a rotary driving-shaft I, and may be described as follows, to wit: If a line be drawn from the axis of shaft I to the middle portion of the lower end of the arm forming said cam, it will be seen that cam-face g at the right diverges upwardly from said line and that, on the contrary, cam-face'g at the left converges upwardly toward said line. Each side or face of the cam may, therefore, be said to have its high and low portions, observing that the high and low portions at one side are arranged the reverse of the high and low portions at the opposite side. The arm which thus provides a cam is widened at its lower end, so as to provide shoulders g for engaging and raising the adjacent ends of the toggle-arms, and as a means for maintaining'said arms in engagement with said shoulders I may provide any suitable arrangement of weight or spring-for example, a spring I, having its ends connected with the toggle-arms by rods or bolts K. When the eccentric is operated, the cam-arm G will be actuated thereby as a strap, but will be forced to vibrate by reason of the opposition of the toggle-arms to its high cam portions, it being observed that the movable jaw B is subject to a spring normally resisting its forward movement, as, for example, a spring-cushion L and a rod M, engaging the spring-cushion and hinged to the movable aw.

The peculiar arrangement of cam-faces permits one revolution of the eccentric to cause two operations of the jaw B, which, by reason of the arrangement of high portions of the cams, will, while being reciprocated bodily toward and away from the jaw A, have a vibratory rocking action in a way to act con= tinuously in crushing during each and all of its bodily reciprocating actions. While thus operating, the jaw will have its active crushing-point shifted back and forth between its upper and its lower ends, thereby doing continuous work and at the same time requiring a minimum amount of power.

It is understood that the machine may be used for crushing stone or rock and the like, but that for convenience it may be termed a crushing-machine.

It will be seen that during operation the vibratory jaw serves to alternately contract and expand the space or opening which is formed between the lower end portions of the two jaws; also, that the trunnions at the lower end of the vibratory jaw reciprocate toward and away from the oppositely-arranged jaw and thereby provide in effect reciprocating pivotally-supporting means by which the vibratory jaw is upheld. As hereinbefore stated, the vibratory jaw can either be supported by the trunnions or by links, so far as its employment in connection with the cam and toggle is concerned; but I desire to cover, as a matter of further improvement, the vibratory jaw having its lower end sustained by reciprocating pivotally-supporting means supported in turn by a suitable guideway along which such means reciprocates during the vibratory action of the jaw.

WVhat I claim as my invention is--- 1. In a crusher, the combination with the movable jaw of the toggle for operating the same and a pitman provided with a cam portion G arranged between the opposing ends of the toggle arms, substantially as described.

2. In a crusher, the combination with the movable jaw of the toggle, the cam for operating the toggle, and the eccentric for operating the cam, substantially as described.

3. The combination with the movable jaw, of the toggle for operating the same, and the arm providing acam for operating the toggle at the middle thereof, said arm being adapted to engage the toggle arms so as to successively raise the same.

4. The combination with the movable jaw, of the toggle for operating the same, a cam for operating the toggle, and a spring connected with both of the toggle arms, substantially as described.

5. The combination in a crusher, of the stationary jaw, the vibratory jaw pivotally supported at its lower end, and pivotally supporting means supported by a guide-way along which such means reciprocates during the independent vibratory action of the jaw, substantially as described.

M. G. BUNNELL.

W'itnessesi RETA M. WAGNER, THos. G. CHAPMAN. 

